The Barrett 2061 HF phone patch provides an interface between an HF network and the international telephone network, allowing HF stations to be connected to telephone subscribers and vice versa.
On receiving a request from an HF station, the base station operator dials the phone number required. When the called party answers the station operator switches the 2061 to "CONNECT".
The automatic VOX is activated and the call between the HF network station and the telephone subscriber proceeds automatically, the transmitter being keyed by the telephone subscriber's voice.